--- zzzz-none-000/linux-2.6.39.4/include/linux/radix-tree.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/include/linux/radix-tree.h	2021-11-10 13:38:17.000000000 +0000
@@ -156,7 +156,7 @@
  * must hold the tree lock to prevent parallel updates.
  */
 static inline void *radix_tree_deref_slot_protected(void **pslot,
-							spinlock_t *treelock)
+							spinlock_t *treelock __attribute__((unused)))
 {
 	return rcu_dereference_protected(*pslot, lockdep_is_held(treelock));
 }